for murder without any dna evidence. according to insiders at cnn, there is word that that conviction could be thrown out. he was implicated in the case because of his romantic relationship with levy while she worked as a federal intern. >> it has been a long day full of tough questions board to -- tough questions for john brennan. lawmakers grilled him over the administration's drone policy, targeting american terrorists. >> donna, that hearing is still going on. it was contentious at times as brennan defended the drone program, telling lawmakers districts are only used for major threats. >> stopped the killing. stop the drones. >> disrupting cia nominee john brennan as soon as he began to testify. the interruption halted the senate hearing for minutes as the intelligence committee question brennan over a secret drone program to target american terrorists. >> i would like to ask you about the status of the administration's efforts to institutionalize rules and procedures for the conduct of drone strikes. >> the president has insisted that any actions that we take will be legally grounded.